Oh my heavens! I think you have even more patience than I do. I remember fleas. It's been a long time, but that's even worse than lice. A nightmare. Hearty creatures.

Yeah, if they are used to going outdoors, then they have to go outdoors. Our cats have been only indoor pets. Once there was a feral we took indoors. He had been living on our front step (in a heated house, of course) for years but then started to fail. After we took him in he never showed any inclination to go out again.

Your poor dog. I'm sure he hated the urine also :))